Improvement in clay-sifters



N. GODDARD. Clay-Sifter.

No. 202,717. Patented April 23,1878.

OQOQO O 9 O 9 O Q 6 G O 9 Fig.2.

INVENTEIR M WITNESSES UNITED STATES PATENT OFFICE.

NATHAN GODDARD, OF FRAMINGHAM, MASSACHUSETTS.

IMPROVEMENT IN CLAY-SIFTERS.

Specification forming part of Letters Patent No. 202,717, dated April 23, 1878; application filed October 20,1877.

To all whom' it may concern:

Be it known that I, NATHAN GODDARD, of Framingham, in the county of Middlesex and State of Massachusetts, have invented an Improved Olay-Sifter, of which the following is a specification The invention relates to a device for sifting pulverized clay frompebbles and dbris found in clay-beds in preparing the clay for brickmaking; and consists of a perforated revolving cylinder mounted on an axle upon a frame, and said cylinder revolves by its axis on said frame, and has one of its ends closed, and at the other end the diaphragm is centrally perforated, having a rim or border attached to the cylinder, and the remaining part open. In said rim or border is a gate. which can be opened or closed, as occasion demands.

In the accompanying drawings, which are made apart of this specification, Figure 1 shows an elevation of the machine andthe perforated diaphragm provided with its gate, and Fig. 2 shows a longitudinal section through the cylinder-axle and frame of the machine.

The lettersAA, &c., represent the frame, on which revolves a perforated cylinder, B; G, the closed end or disk of the cylinder; D, the centrally-perforated diaphragm at the other end of the cylinder; E, the spider, composed of the spokes d d, &c., and hub d; F, a gate in said perforated diaphragm or border, hinged to the edge of the diaphragm, so as to open outward from the periphery of the cylinders edge, and has fastenin-gs a. a b, an axle, upon which revolves the cylinder; 0, a drum, by which power is applied to revolve the cylinder; d d, &c., spokes, and d, hub of the spider E, and are attached to the inner surface of the cylinder; and ff are boxes keeping the axle in place.-

Clay-beds often have mixed with the clay pebbles, coarse gravel, and other dbris, and the same must be sifted from the clay before it can be worked over into bricks. I first plow up and pulverize and dry the clay. I then shovel the mass into the open end of the'cylinder, setting the cylinder in motion, and the revolution of the same causes the clay to be sifted through the perforations in the cylinder, while the pebbles and dbris are retained within the cylinder.

To remove said pebbles and dbris from the cylinder, I have made a gate, F, which is hinged to the inner edge of the diaphragm D, having suitable fastenings, as a a, to keep the gate closed when the machine is in operation; and I have found a gate thus formed and placed the best from which to expel the pebbles and dbris.

The end or disk 0 of the cylinder is closed, the axle passing through the center of the cylinder, and carrying the same. I have also placed the spider E near the diaphragm D, to

" give strength and stability to the cylinder.

with a gate, F, at its margin, substantially as shown, and for the purpose described.

NATHAN GODDARD. Witnesses:

JOHN L. LINCOLN, MARIA B. LINCOLN. 

